Method of treating brown coal for liquefaction

Details Method of treating brown coal for liquefaction Method of treating brown coal for liquefaction

1986-02-04

1987-12-22

Metz, Andrew H.

Mineral oils: processes and products

By treatment of solid mineral, e.g., coal liquefaction, etc.

Plural hydrogenation steps

208413, 208418, 208425, C10G 100, C10G 106

Patent

active

047145439

ABSTRACT:
A starting slurry composed of raw brown coal and a solvent is heated and pressurized, subjected to gas-liquid separation and dehydration and then to hydrogenation/liquefaction. The CO.sub.2 -containing gas produced in the preheating/dehydration step and/or a CO.sub.2 -containing gas supplied from outside the system is blown into the slurry in the above-mentioned preheating/dehydration step, whereby carbonate-forming metal components in the brown coal are converted to the carbonates thereof in advance. In this manner, the hydrogenation/liquefaction efficiency is improved, and stabilized long-term continuous operation is attained.

REFERENCES:
patent: 4128471 (1978-12-01), Malone et al.
patent: 4185395 (1980-01-01), Nakako et al.
patent: 4206033 (1980-06-01), Neavel et al.
patent: 4235699 (1980-11-01), Ratcliffe et al.
patent: 4322283 (1982-03-01), Maa et al.
patent: 4443321 (1984-04-01), Compton

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